From d18bbc304e838ecf3b888ce4d70f1d96d21821f5 Mon Sep 17 00:00:00 2001
From: Daniel McIlvaney <damcilva@microsoft.com>
Date: Fri, 7 Jun 2024 11:38:54 -0700
Subject: [PATCH 31/31] fix(dracut-functions): avoid awk in get_maj_min()

The `get_maj_min()` cache lookup is commonly used
across many flows. While `awk` should be available,
some highly constrained environments may not have it.
A second call to `grep` can provide the same behaviour
without adding a dependnecy.

Lines in the cache will be of the form "/dev/sda2 8:2".
`awk '{print $NF}'` returns the last word of a matching line. Since
the initial matching regex is so specific a second call to grep can
easily extract the last word.

(cherry picked commit ec7efd5701e9a1b24f2e85666d625fb1fe46ce86)

Related: RHEL-47145
---
 dracut-functions.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dracut-functions.sh b/dracut-functions.sh
index 43d905e3..b4d57454 100755
--- a/dracut-functions.sh
+++ b/dracut-functions.sh
@@ -243,7 +243,7 @@ get_maj_min() {
     local _out
 
     if [[ $get_maj_min_cache_file ]]; then
-        _out="$(grep -m1 -oE "^${1//\\/\\\\} \S+$" "$get_maj_min_cache_file" | awk '{print $NF}')"
+        _out="$(grep -m1 -oE "^${1//\\/\\\\} \S+$" "$get_maj_min_cache_file" | grep -oE "\S+$")"
     fi
 
     if ! [[ "$_out" ]]; then
-- 
2.42.0